/Engine/Source/Editor/BlueprintGraph/Classes/EdGraphSchema_K2.h
Create menu for variable get/set nodes which refer to a variable which does not exist.
void GetNonExistentVariableMenu ( [FToolMenuSection](API\Developer\ToolMenus\FToolMenuSection) & Section, const [UEdGraphNode](API\Runtime\Engine\EdGraph\UEdGraphNode) * InGraphNode, [UBlueprint](API\Runtime\Engine\Engine\UBlueprint) * OwnerBlueprint ) const